<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            font-size: 0;
        }
        .box {
            width: 100px;
            height: 100px;
            background-color: red;
            display: inline-block;
            font-size: 16px;
        }
    </style>
</head>
<body>
    <div class="box">1</div>
    <div class="box">2</div>
</body>
</html>